Tire wheel assembly

Abstract

Provided is a tire wheel assembly making it possible to effectively reduce cavity resonance noise without causing either negative influence on deformation of a tire or deterioration in rim assembling workability. A tire wheel assembly of the present invention includes a pneumatic tire, and a wheel provided with a rim fitted with the pneumatic tire, and forms a cavity portion between the pneumatic tire and the rim. The tire wheel assembly comprises at least one tube, which has one end thereof closed while having a length of 55% to 110% of a reference length L₀ corresponding to one fourth of a cavity resonance wavelength, is provided so as to open to the cavity portion.

Description

TECHNICAL FIELD[0001]The present invention relates to a tire wheel assembly including a pneumatic tire and a wheel. More specifically, the present invention relates to a tire wheel assembly configured to effectively reduce cavity resonance noise.BACKGROUND ART[0002]As one of causes which generate noise in a pneumatic tire, there is cavity resonance noise due to air with which an inside of the tire is filled. This cavity resonance noise is generated due to vibration of air inside the tire, the vibration being caused by vibration of a tread portion because the tread portion vibrates due to irregularities of a road surface.[0003]As a method of reducing noise caused by a cavity resonance phenomenon as described above, there has been proposed one where a time period during which resonance occurs at the same resonance frequency is reduced by changing, along a circumferential direction of the tire, in a cross-sectional area of a closed space formed with a tire and a wheel (for example, ref...

AI Technical Summary

Benefits of technology

[0011]For example, when the tire size is 215/60R16, A=215, B=60 and C=16 are given, whereby L0=392 mm is obtained. That is, the above equation (1) is an equation for easily calculating, from the tire size, the reference length L0 (mm) corresponding to one fourth of the cavity resonance wavelength.

[0012]In the present invention, although it is required to provide at least one tube so as to open to the cavity portion, an effect in cavity resonance noise reduction can be enhanced if a plurality of tubes are provided so as to open to the cavity portion; and the opening portions of these tubes are arranged in one arbitrary location on a circumference, or in two locations facing each other across the rotational axis of the tire. At this point, it is desirable that an angle with respect to the rotational axis of the ti

Problems solved by technology

As one of causes which generate noise in a pneumatic tire, there is cavity resonance noise due to air with which an inside of the tire is filled.

This cavity resonance noise is generated due to vibration of air inside the tire, the vibration being caused by vibration of a tread portion because the tread portion vibrates due to irregularities of a road surface.

In the abovementioned method, however, if a change in cross-sectional area of the

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